Originally Posted by
LordHamster
Ok, I called. United said somehow my number hadn't been added to the reservation. Which is strange because every other web-based reservation I've EVER made through Amex has worked flawlessly. For now I'm going to assume it was a one-time hiccup.
being united, this is unlikely to be a one off thing.
if memory serves, you should be able to add your mp number from the reservation screen on ua. com